Sliding Mode Control Scheme for a CLLC Resonant Converter

Zou, Shenli; Mallik, Ayan; Lu, Jiangheng; Khaligh, Alireza

doi:10.1109/tpel.2019.2904456

Cited by 37 publications

(8 citation statements)

References 28 publications

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“…The working state of the CLLC resonant converter is more complicated, so the extended description function method is used to simplify the nonlinear state equation of its model, and linearization is performed. Finally, the transfer function of the CLLC resonant converter switching frequency to output voltage is obtained as follows [19]:…”

Section: System Control Strategymentioning

confidence: 99%

“…Fig 19 shows the operating waveforms of the primary-side power switches Q 1 ~Q4 when the system operates in parked charging mode. Before the drive signal arrives, the drain-source voltage of the power switches has been pulled to zero potential by the body diode to realize ZVS and reduce the switching loss.…”

Section: Simulation Waveform Of the Primary-side Circuitmentioning

confidence: 99%

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Research on dual-output port on-board charging system based on CLLC resonant converter

et al. 2023

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This paper proposes a dual-output port on-board charging system based on a CLLC resonant converter, which can realize the function of simultaneously charging high-voltage power batteries and low-voltage batteries. The system topology is composed of a front-stage PFC and a latter-stage CLLC resonant converter. The system uses a three-port transformer to couple the resonant converter, the high-voltage charging circuit, and the low-voltage charging circuit. The system also realizes soft switching through resonant components. According to the design requirements of the charging system, the control strategy of the dual-output ports is determined by analyzing the working mode and gain characteristics of the system and the dual closed-loop control structure is designed to realize the functions of power factor correction and wide-range voltage regulation. Simulation and experimental results verify the correctness of theoretical analysis and structural design.

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Section: System Control Strategymentioning

confidence: 99%

Section: Simulation Waveform Of the Primary-side Circuitmentioning

confidence: 99%

Research on dual-output port on-board charging system based on CLLC resonant converter

et al. 2023

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“…The confined flux can contribute to less radiated EMI and eddy current loss in the surrounding metals. With the increase in switching frequency (from 100 kHz to 500 kHz to 1 MHz), the reduction on radiated EMI and eddy current loss plays a key role in improving the system performance [17]. The coupling structure between the primary and secondary windings gives additional control freedom in the mitigation of the common mode (CM) noise.…”

Section: Investigation Of the Three-winding Transformermentioning

confidence: 99%

A comprehensive design approach for a three‐winding planar transformer

Zou¹,

Singhabahu

Chen

et al. 2022

IET Power Electronics

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In this paper, a new three-winding planar transformer design with the integrated leakage inductor is proposed for a triple-active-bridge converter. It enables two output voltage levels: a high voltage (HV) output port and a low voltage (LV) output port. The primary and secondary windings are split unevenly in both side legs while the tertiary winding is connected in parallel. The unique winding configuration enables: (i) enhanced efficiency with low volume; and (ii) suppressed parasitic capacitances. Detailed transformer reluctance and loss models are developed in the design process. The core geometry is optimized using a reluctance-model-based mathematical computation. Moreover, comprehensive high-fidelity simulations are conducted to analyse the trade-offs among parasitic capacitances, losses, and inductances. The customized core and the non-overlapping winding boards are assembled, characterized, and tested under various power flow conditions.

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“…These converters benefit from low device stress compared to other typologies like the class-E [4,18,19] and have a broad range of applicable controllers available. Some of the most common control techniques are: Tunable resonant tank capacitor control [20][21][22][23], bang-bang control [24][25][26][27], frequency modulation (FM) control [28][29][30][31], and lastly, phase-shift control [32,33]. Unlike any of the other control methods, the phase-shift control uses double the number of switches in the inverter to achieve phase-control, thereby making it less compelling if cost or power density is of concern.…”

Section: Introductionmentioning

confidence: 99%

Identification of ZVS Points and Bounded Low-Loss Operating Regions in a Class-D Resonant Converter

Dahl

Ammar

Andersen

2021

IEEE Trans. Power Electron.

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This paper presents an analysis of the different loss modes of the switching devices in a class-D series resonant converter operating with either fixed dead time or fixed duty cycle. A feasible operating region where the FETs in the inverter stage only exhibit reverse conduction losses, with no hard-switching, is identified. Furthermore, the impact of using a fixed dead time versus a fixed duty cycle is investigated. We find that using a fixed dead time is superior to using a fixed duty cycle, as a broader operating range can be achieved for the same losses, or the same operating range can be achieved with lower losses. A reduction in the reverse conduction losses of up to 59% or an expansion of the operational frequency range by 33% when using a fixed dead time is found. The modeling approach is validated on a 1-MHz prototype employing GaN switching devices. Lastly, a design example shows how the presented analysis can be used to determine the optimal fixed dead time/duty cycle for use with frequency modulation control such that the losses are minimized.

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Sliding Mode Control Scheme for a CLLC Resonant Converter

Cited by 37 publications

References 28 publications

Research on dual-output port on-board charging system based on CLLC resonant converter

Research on dual-output port on-board charging system based on CLLC resonant converter

A comprehensive design approach for a three‐winding planar transformer

Identification of ZVS Points and Bounded Low-Loss Operating Regions in a Class-D Resonant Converter

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